<template>
  <div class="upload-container">
    <el-button :style="{background:color,borderColor:color}"
               icon="el-icon-upload"
               size="mini"
               type="primary"
               @click=" dialogVisible=true">上传图片
    </el-button>
    <el-dialog :visible.sync="dialogVisible">
      <el-upload :multiple="true"
                 :file-list="fileList"
                 :show-file-list="true"
                 :on-remove="handleRemove"
                 :on-success="handleSuccess"
                 :before-upload="beforeUpload"
                 class="editor-slide-upload"
                 :action="uploadUrl"
                 :headers={token:token}
                 list-type="picture-card">
        <el-button size="small"
                   type="primary">点击上传</el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">取 消</el-button>
      <el-button type="primary"
                 @click="handleSubmit">确 定</el-button>
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import { domain } from "@/config";
export default {
  name: "EditorSlideUpload",
  props: {
    color: {
      type: String,
      default: "#1890ff"
    },
    qiniu: Object
  },
  data() {
    return {
      dialogVisible: false,
      listObj: {},
      fileList: []
    };
  },
  methods: {
    checkAllSuccess() {
      return Object.keys(this.listObj).every(
        item => this.listObj[item].hasSuccess
      );
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v]);

      if (!this.checkAllSuccess()) {
        this.$message(
          "请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！"
        );
        return;
      }
      this.$emit("successCBK", arr);
      this.listObj = {};
      this.fileList = [];
      this.dialogVisible = false;
    },
    handleSuccess({ data }, file) {
      const uid = file.uid;
      const objKeyArr = Object.keys(this.listObj);
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = data;
          this.listObj[objKeyArr[i]].hasSuccess = true;
          return;
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid;
      const objKeyArr = Object.keys(this.listObj);
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]];
          return;
        }
      }
    },
    beforeUpload(file) {
      const _self = this;
      const _URL = window.URL || window.webkitURL;
      const fileName = file.uid;
      this.listObj[fileName] = {};
      return new Promise((resolve, reject) => {
        const img = new Image();
        img.src = _URL.createObjectURL(file);
        img.onload = function() {
          _self.listObj[fileName] = {
            hasSuccess: false,
            uid: file.uid,
            width: this.width,
            height: this.height
          };
        };
        resolve(true);
      });
    }
  },
  computed: {
    token() {
      return getToken();
    },
    uploadUrl() {
      return `${domain}/web/common/uploadFile`;
    }
  }
};
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  /deep/ .el-upload--picture-card {
    width: 100%;
  }
}
</style>
